Example usage for org.objectweb.asm Opcodes GETSTATIC

List of usage examples for org.objectweb.asm Opcodes GETSTATIC

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Introduction

In this page you can find the example usage for org.objectweb.asm Opcodes GETSTATIC.

Prototype

int GETSTATIC

To view the source code for org.objectweb.asm Opcodes GETSTATIC.

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Usage

From source file:test.GenSourceDebugExtension.java

License:Open Source License

public static byte[] dump() {
    ClassWriter cw = new ClassWriter(0);
    MethodVisitor mv;/* w ww .  ja v  a2s . c  o m*/

    cw.visit(52, Opcodes.ACC_PUBLIC + Opcodes.ACC_SUPER, "sourcedebugextension/Test", null, "java/lang/Object",
            null);

    // This is the important part for the test - it's an example SourceDebugExtension found
    // in Clojure.
    cw.visitSource("dispatch.clj",
            "SMAP\ndispatch.java\nClojure\n*S Clojure\n*F\n+ 1 dispatch.clj\nclojure/pprint/dispatch.clj\n*L\n144#1,8:144\n*E");

    {
        mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitCode();
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false);
        mv.visitInsn(Opcodes.RETURN);
        mv.visitMaxs(1, 1);
        mv.visitEnd();
    }
    {
        mv = cw.visitMethod(Opcodes.ACC_PUBLIC + Opcodes.ACC_STATIC, "main", "([Ljava/lang/String;)V", null,
                null);
        mv.visitCode();
        mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "err", "Ljava/io/PrintStream;");
        mv.visitLdcInsn("Hello");
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V",
                false);
        mv.visitInsn(Opcodes.RETURN);
        mv.visitMaxs(2, 1);
        mv.visitEnd();
    }
    cw.visitEnd();

    return cw.toByteArray();
}